International Journal of Aquaculture, 2025, Vol.15, No.3, 155-164 http://www.aquapublisher.com/index.php/ija 160 containing 30% crude protein showed significant growth across all water temperature levels. During the first three weeks, growth was relatively slow in both treatments, followed by a marked acceleration in growth from week four onward. In Treatment 1, no significant weight gain was observed between weeks 7 and 8, however, a sharp increaseoccurredbetweenweeks8and9.Despitebothgroupsstartingwithanaverageinitialweightof3.0 g,the finalmeanbodyweightreached14.78 ginTreatment1and13.73 ginTreatment2.Theresultsshowedno significance difference between treatments (P = 0.110, Figure 5). Figure 4 Mean body weights of O. andersonii reared in plastic tanks for 9 weeks Figure 5 Comparison of final body weights between treatments 3.2Size At the start of the experiment, the smallest fish had a length of 3.8 cm while the biggest fish had a length of 7 cm. Therefore, the experimental fish for both treatments had different lengths ranging between 3.8 cm and 7 cm. At the end of the experiment, treatment 1 had a final mean length of 8.97 cm while treatment 2 had slow change in length in the first two weeks and in week five it had a fast change, therefore at the end of the experiment, treatment 2 had a final mean length of 8.36 cm (Figure 6). The diagram below shows the results of significance difference (P≤ 0.05) between the treatments, (P=0.007) (Figure7). Figure 6 Final total length of Oreochromis andersonii at the end of the experiment
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